Advertisements
Advertisements
प्रश्न
Tick (√) the correct alternative from the choice given for the following statement
Burning is a
पर्याय
slow process
fast process
natural process
none of the above
Advertisements
उत्तर
fast process
APPEARS IN
संबंधित प्रश्न
State whether the following is physical or chemical changes.
burning of wood -
State whether the following is physical or chemical changes.
passing electric current through a heater rod —
State whether the following is physical or chemical changes.
Melting of wax —
Tick (√) the correct alternative from the choice given for the following statement
When sugar is heated, its colour changes into
What role does energy play in initiating a chemical change ?
Under which different types can the following changes be classified?
Revolution of the earth around the sun.
Explain in brief the involvement of energy in physical and chemical changes.
Some changes are listed in the following table. For each change, write in the blank column, whether the change can be reversed or not.
| S. No. | Change | Can be reversed (Yes/No) |
| 1. | The sawing of a piece of wood | |
| 2. | The melting of ice candy | |
| 3. | Dissolving sugar in water | |
| 4. | The cooking of food | |
| 5. | The ripening of a mango | |
| 6. | Souring of milk |
Paper, LPG, CNG petrol, etc, are ______ substances.
Cut vegetables turn brown when exposed to air, this is due to ______.
